Just when Ye Han was guessing, the experimental data had been sent back to China, and then sent back to the front through the command system, and the army aviation, which had been on standby, immediately took off, and hundreds of armed helicopters carrying infrasonic cannons flew towards the high-wall defense line.

The swarm dispersed as soon as it crossed the border, approaching the swarm from both north and east, and when the swarm reached the vicinity of the swarm, all infrasonic cannons were activated at the same time.

An overwhelming infrasound wave descended from the sky, and the insect swarm was thrown into chaos, and their instinct to seek advantage and avoid harm caused them to flee quickly.

Afterwards, Ye Han couldn't help but sigh that the infrasonic cannon was like an invisible baton, where it pointed, the swarm would flee to.

At this point, the previous doubts have been answered, and the military can completely deploy a large number of sonic cannons on the border to prevent the swarm from crossing the border.

The military doesn't even need to send people to guard the border, as long as a batch of sensors are placed outside the border, and when the swarm is detected, it immediately sends a signal to the infrasonic cannon on the border to activate it, and the swarm can be firmly kept out.

After the infrasonic cannon appeared, Ye Han felt that the airborne division could already retire, but he couldn't wait for the order from his superiors, and a day later, he waited for the order to catch another batch of bugs.

Ye Han was very puzzled, didn't he get the data? How can you still catch it? Could it be that a new type of giant worm has appeared?

He immediately found the experimental group and wanted to get some internal information from the experimental group, but the experimental group told him that he could catch whatever he encountered, and he could pick the largest number of catches.

Ye Han was even more confused, and couldn't figure out what medicine was sold in the gourd of the experimental group.

The experimental team saw his question, and the bespectacled experimenter pushed his glasses and said: "Master Ye, you may not know much about the situation, we have used infrasonic weapons on the battlefield for a long time, infrasonic waves have long been no secret to aliens, these giant insects should be specially optimized by aliens, they can adjust the microstructure of their bodies in a very short time, and reduce the impact of infrasound waves through this method." ”

"The bugs we caught yesterday don't respond much to the frequency measured yesterday, and although we measured the new frequency, we can't be sure if this frequency is useful for the swarm, so we have to catch a few more and come back to test it."

"So amazing?" Ye Han felt like he was listening to a fantasy story.

The spectacle experimenter was helpless: "The details are not clear yet, and we need more experimental data to find the answer." ”

"Understood." Ye Han nodded, "I arrange shifts for the troops, and I will catch a few every six hours to come back, how about it?" ”

"It doesn't need to be so frequent, one round in twelve hours is fine, the change is not obvious when the time is short, and it is not abnormal to catch it."

"Okay, twelve hours." As soon as he finished speaking, Ye Han showed a puzzled look again, "No, isn't it just to measure the resonance frequency?" Wouldn't it be okay to just pull the infrasonic cannon up and adjust the frequency to the swarm? ”

"Yes, indeed." The experimenter nodded, "But this bug is too resistant to infrasound, and the incorrect frequency will only irritate the swarm, and has no expulsion effect." ”

"Eviction? Didn't they stun them to death? ”

"I can't die." The experimenter shook his head, "This kind of insect is very resistant to infrasound, even if it has the right frequency, it can only play the role of expellation, unless the generator is directly into the stomach of the worm." ”

Ye Han couldn't help but gasp, this is amazing, isn't it?

Infrasonic is simply pervasive, even if you wear a heavy power armor, you may not be able to block infrasound, these giant insects actually did it!

The researcher pushed his glasses again: "It's not just infrasound, these insects are also very resistant to microwaves, we have done a lot of experiments, put the insects in the microwave oven can be roasted, the shells are scorched, there is still no inside, unless the shells are peeled, they can be cooked faster." ”

Ye Han grinned, and said in his heart that you guys have a really heavy taste for research!

He looked thoughtfully at the wall: "So...... Is the problem in the shell? ”

"That's what we're guessing too, but so far we only have the results of microwave experiments, and we haven't found any evidence from other aspects."

Ye Han pouted secretly, what he was doing research was hypocrisy, what evidence do you need when you have the results?

However, he finally figured out the ins and outs, and immediately arranged manpower after bidding farewell to the experimental group, and for the sake of prudence, a battalion was dispatched every twelve hours to catch the giant insects.

After receiving the order, the soldiers felt quite fresh, it was not that they had never caught bugs before, but it was the first time they had encountered such a large scale.

In this way, the people of the airborne division became a professional insect trapping team for the next period of time, and wherever the swarm moved, the airborne division followed.

The whole experimental group was also walking along!

The experimental team has an entire fleet of heavy vehicles, each truck is a separate laboratory, and all kinds of strange experimental equipment are available, including a large microwave chamber for roasting bugs.

This thing is so powerful, if you put someone in it, it will become a barbecue in minutes.

Ye Han didn't pay attention to it at all after hearing about it, but Luo Qi remembered it, and when he was idle, he took two groups of fighters out for a walk, and caught two giant insects and seven or eight crocodiles, the smallest one was only half a meter, and the largest one was more than five meters long!

This incident immediately caused a sensation in the camp, and the key was not how big the crocodile was, but that Luo Qi had caught other species that were not bugs!

The insect outbreak began in Jingjiang, and today, that is ten years ago, during these years, the terrestrial life on the earth has been almost eaten by insects, and only penguins, polar bears and other animals living in extreme conditions have not been affected much.

Southeast Asia has a warm and humid climate, which is one of the most suitable areas for giant insects, and the biological population here has long been severely damaged, and it is a miracle that Luo Qi can catch so many crocodiles!

But if you think about it, there is nothing wrong with it, insects only develop on land, and there is nothing difficult to understand about the crocodile, an amphibious reptile, that has survived to this day.

And the largest crocodile is nearly six meters long, about twice as long as an ordinary giant insect, plus it is covered with rough scales, it is really right with the bug, and the bug is really not necessarily the opponent of the crocodile...... Well, considering the effect of the puffing virus, this crocodile is not good or only medium-sized, and it is not surprising that a large crocodile grows to ten meters long.

The experimental group was interested in the origin of the crocodile, but the warriors didn't care where the crocodile came from, they only cared about whether the thing was good or not...... That's right, Luo Qi caught them back just to have a good meal, and for this matter, he specially begged Ye Han to come forward and borrow a microwave cabin from the experimental team to roast crocodiles.